Polydrug use among 15- to 16-year olds: Similarities and differences in EuropePublishing year2010Type of DocumentPeer reviewed article/paperDocument languageEnglishAuthorsOlszewski, D., Matias, J., Monshouwer, K. & Kokkevi, A.ISSN0968–7637Volume17Number4Pages287–302AddedLudwig Kraus 31/07/2015